cIOSCORP v3.6 Error!

I'm trying to install cIOSCORP v3.6 but I get a (ret= -1) error after each installation and a "24 files installed, 24 files failed!" message at the end. I'm running a 4.1U version. I read that some guy had a similar problem and solved it using "Pimp my Wii", but everything seems to be up-to-date. I've installed IOS249 already.